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DAT Biology (Chapter 2 - Cell structure) Flashcards

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2609511472Plasma membranePhospholipid bilayer with embedded proteins, glycoproteins, cholesterol etc..0
2609523409Fluid Mosaic ModelScattered proteins within a flexible plasma membrane1
2609528688The plasma membrane is ________selectively permeable2
2609534497Small non polar molecules permeabilityVery permeable (O2 / hydrocarbons)3
2609535378Small polar molecules permeabilityPermeable (H2O)4
2609543017Large polar/nonpolar permeabilityNot permeable (Glucose)5
2609543767Ion permeabilityNot permeable6
2609546954Channel proteinsProteins function like hallway7
2609548160Ion channelsIon specific passageways / Included gated ion channels in nerve muscles8
2609553740PorinsChannels that allow passage of certain ions and small polar molecules through the membrane9
2609556669AquaporinsDramatically increase the passage rate of H2O molecules10
2609580939Cholesterol increases ______ of cell membranerigidity / viscosity11
2609582628Cholesterol _____ itself inside of the cell membraneIntercalates12
2609584403Nucleus is bounded by the _______nuclear envelope13
2609587682Glycocalyxcarbohydrate coat that overs outer face of plasma membrane. Consists of glycolipids and glycoproteins14
2609595705Chromatin winds itself around globular ______ proteinshistone15
2609598486Globins aggregate together in DNA to form ______nucleosomes16
2609601285Ribsome is composed of what two subunits60s and 40s -------- total 80s17
2609607946Difference between lysosomes and peroxisomeslysosomes contain digestive enxymes and break down waste, cellular debris, etc Peroxisomes break down Peroxide, toxic substances, and in plant modify by-products of photorespiration.18
2609624597Peroxisomes are called _____ in germinating seedsGlyoxysomes19
2609628204Three types of protein fibers in cellsMicrotubules, Intermediate filaments, microfilaments20
2609630524Microtubules are made of _____ and are involved in the _____tubulin / spindle apparatus21
2609635625Microfilaments are made of the protein ______actin22
2609641675Cilia and flagella are responsible for ______cellular movement23
2609642796Cilia and flagella are made up of _______ in a _____ arraymicrotubules, 9+ 224
2609655813Centrioles and basal bodies act as _____microtubules organizing centers25
2609657376A pair of centrioles is enclosed in a ______centrosome26
2609660512______ and Vesicles are fluid filled bodiesVacuoles27
2609663416Central vacuoles exhibit ______ when filled, store ______ , and carry out _______ functionturgor, nutrients, lysosome28
2609671548Contractile vacuoles are only found in ______ and ________ out of the cellproks, pump excess water out29
2609690804Smooth ER is responsible for _____ and also ______lipid/hormone synthesis , breakdown of toxins30
2609696518In plants the cell wall consists of _______cellulose31
2609699423In fungi the cell wall can consist of cellulose or ____chitin32
2609705382Anchoring junctions are found in ______ and include ______animals / desmosomes33
2609710534Tight junctions are found in ______ and are _______animals digestive tracts / tightly stitched seems34
2609714942Communicating junctions transfer _____ or _____ signalschemical or electrical35
2609716721Two kinds of communicating junctionsGap junctions / plasmodesmata36
2609721211Gap junctions are narrow tunnels that have a protein called ______connexins37
2609725722Plasmodesmata are found in _______plant cells38
2609727149Animal cells have _____(3)lysosomes, centrioles, cholesterol39
2609728144Plant cells have _____(3)cell walls, chloroplasts, central vacuoles40
2609733074Prokaryotic ribosome is made up of the following subunits50s 30s ------ 70s41
2609741221Cell walls of bacteria and cyanobacteria are constructed from ______peptidoglycans42
2609743907Hypertonichigh solute outside43
2609743908Hypotoniclow solute outside44
2609745948Isotonicsame solute45
2609750627The diffusion of solutes is called _______dialysis46
2609753032When too much water moves out of the cell _____ occursplasmolysis47
2609757164Countercurrent exchange is the process when _____two regions that have bulk flow in opp directions48
2609766933Receptor mediated endocytosis is a form of _____ and specific molecules called ____ bind to the receptor forming a vessiclepinocytosis, ligands49
2609775979Water flows ___towards solute50

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